Motor surging can be caused by a few different issues:
- Mechanical Misalignment. Your rear axle and components can become misaligned by normal use. We recommend doing an inspection on all your mechanical components to verify items are properly tight and in place
- Low battery. Your BMS protects the battery from draining too much, so if you find yourself near the end of your charge, be sure to lower the assist to reduce consumption. Remember to fully charge your battery before each ride.
- Overload. If you are hauling a load that exceeds the recommended maximum, the controller will do its best to keep up. However, it will take a moment as it measures the excess of energy needed and will stop to protect itself and the battery.
- Loose Connection. All items on your bike will loosen over time. This is why tune-ups and regular inspections are very important. A loose connection will be intermittent and might appear as though something different is happening. Disconnects, even if only for an instant, will shut down your assist. This will include reseating your battery.
- Brakes. The brake sensors in your bike stop the motor power for safety while braking. If the handles are a bit loose or misadjusted, the bike may send a false brake signal, therefore stopping your assist. Click here for a quick guide
- Rough Roads: An excess of vibration on your bike will cause the assist to stop. This should be seen as a signal to reduce your speed and avoid the damaged road. Also, be sure to allow your system to cool down for a couple of minutes and then check your connections before continuing with your ride.
- Swinging Feet. If you are riding with the throttle engaged and swinging your feet, the cadence sensor might think you want to pedal. Depending on your assist level, the bike may give you a boost.
- Improper Braking. You should slightly engage the brakes while coasting so that the movement of your feet is not captured by the cadence sensor. This primarily happens when you swing your feet instead of coasting.
- Cadence Sensor spacing. Your sensor depends on proper spacing to work properly.
If you encounter this issue, reach out to our support team and we will help you verify any of the above causes or help determine a different cause.